Some 2017-2020 Lincoln Continental vehicles may exhibit a noisy or inoperative rear window blind. This may be due to corrosion within the rear window blind mechanism and/or poor engagement between the rear window blind motor and the mechanism. 

Remove the rear window blind. Following the shim kit (P/N 54402A34) instructions, install the shim kit in the rear window blind and clean and lubricate the rear window blind cables as needed. Based on the rear window blind inspection procedure in the instruction sheet, if the cables appear corroded or the movement of the rear window blind is not smooth, the blind has likely been contaminated with water due to a water leak in the vehicle. Diagnose and repair the source of the water leak.